Electrical circuit breaker



FIG. 1 is a front, left and top perspective view of an electrical circuit breaker showing our new design;

FIG. 2 is a front elevation view thereof;

FIG. 3 is a rear elevation view thereof;

FIG. 4 is a top plan view thereof;

FIG. 5 is a bottom plan view thereof;

FIG. 6 is a right elevation view thereof; and,

FIG. 7 is a left elevation view thereof.

The broken lines in the figure drawings are included for the purpose of illustrating unclaimed environment and form no part of the claimed design. 

CLAIM The ornamental design for an electrical circuit breaker, as shown and described. 